JP2010260435A - Damper driving structure of vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain high productivity by improving assemblability and restraint of abnormal noise when a different energizing force from a driving force is applied to a damper. <P>SOLUTION: A damper driving structure includes: a casing 30 having an air flow path; a damper 49 provided in the air flow path of the casing 30 and opening and closing the air flow path; and a driving link 104 connected to the damper 49. The damper 49 is structured to operate between a closing position in abutting onto a seal portion 30b formed inside the casing 30 and an opening position in separating from the seal portion 30b. A biasing portion 104d for biasing the damper 49 toward the opening position is formed integrally with the driving link 104. The biasing portion 104d applies a biasing force to the driving link 104 when the damper 49 is in an area from a position just before the damper 49 abuts onto the seal portion 30b to a position when the damper 49 abuts onto the seal portion 30b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a damper drive structure for driving a damper disposed in a vehicle air conditioner.

  Conventionally, a vehicle air conditioner includes a casing that houses air conditioning equipment such as a heat exchanger. An air flow path for introducing air for air conditioning is formed inside the casing, and the air flow path is opened and closed by a damper (see, for example, Patent Document 1). A driving force is transmitted to the damper of Patent Document 1 via a driving lever. And a damper operate | moves between the closed position contact | abutted to the seal part formed in the inside of a casing, and the open position which leaves | separates from this seal part.

  The drive lever of Patent Document 1 is provided with a metal spring. This spring is for urging the damper toward the open position when it is in a predetermined region on the closed side from when the damper approaches the seal portion until it comes into contact. Therefore, when the damper in the open position is switched to the closed position, a biasing force of the spring is applied to the damper before the closed position, and the biasing force does not strike the seal portion with this biasing force, and abnormal noise is generated. It is suppressed. In addition, when opening the damper in the closed position against the air flow, the biasing force of the spring is applied toward the open position, so that the driving force of the damper can be assisted by the biasing force. The operability is improved.

JP 2004-155329 A

  However, in the damper drive structure of Patent Document 1, since the biasing force is applied to the damper by a metal spring which is a separate part from the drive lever and the casing, the number of parts increases and the number of manufacturing steps increases. In addition, since the spring is springy, the assembly workability by the worker during manufacture is poor. Furthermore, when assembling the spring, it may be necessary to adjust the position because it is a separate part. That is, when the spring is provided, it is conceivable that the productivity of the air conditioner deteriorates.

  Further, when the spring is a separate part, rattling may occur with respect to the other part, which may cause abnormal noise when the vehicle travels, for example.

  The present invention has been made in view of the above points, and the object of the present invention is to improve the assembly workability when the urging force different from the driving force is applied to the damper. Is to suppress the generation of abnormal noise.

  According to a first aspect of the present invention, there is provided a casing having an air flow path, a damper that is provided in the air flow path of the casing, and that opens and closes the air flow path. A drive member connected to transmit the driving force to the damper, and the damper operates between a closed position where the damper contacts a seal portion formed inside the casing and an open position away from the seal portion. In the damper drive structure of the vehicle air conditioner configured to be configured, the drive member has a predetermined region on the closed side from the predetermined position before the damper contacts the seal portion to the contact with the seal portion. In some cases, a biasing portion that applies a biasing force for biasing the damper toward the open position to be smaller than the driving force is integrally formed.

  According to this configuration, when the damper is in the predetermined region on the closing side, the damper is biased toward the open position by the biasing force of the biasing portion. The damper does not strike the seal portion vigorously, and the generation of abnormal noise is suppressed. In addition, when the damper is opened and moved so as to oppose the air flow, the driving force of the damper is assisted by the urging portion, so that the operability is improved.

  And since an energizing part is integrally formed with a drive member, it becomes possible to attach an energizing part to a casing simultaneously with assembling a drive member to a casing. At this time, since the assembly position of the urging portion is determined by the assembly of the drive member, it is not necessary to adjust the assembly position of the urging portion.

  Further, after the drive member is assembled, the urging portion does not rattle because the urging portion is integral with the drive member.

  According to a second aspect of the present invention, there is provided a casing having an air flow path, a damper that is provided in the air flow path of the casing, and that opens and closes the air flow path. A drive member connected to transmit the driving force to the damper, and the damper operates between a closed position where the damper contacts a seal portion formed inside the casing and an open position away from the seal portion. In the damper drive structure of a vehicle air conditioner configured to be configured so that the casing is in a predetermined region on the closed side from the predetermined position before the damper contacts the seal portion to the contact with the seal portion. Further, an urging portion for applying an urging force for urging the damper toward the open position to be smaller than the driving force is integrally formed.

  According to this configuration, since the urging portion is formed integrally with the casing, the work of assembling the urging portion to the casing becomes unnecessary, and the adjustment of the assembly position of the urging portion becomes unnecessary. Furthermore, the rattling of the urging unit is eliminated.

  According to a third invention, in the first invention, the drive member is made of an elastic resin material, and the urging portion is configured to apply an urging force by the elasticity of the resin material. Is.

  According to this configuration, by using the elasticity of the resin material, a desired urging force can be obtained without complicating the structure.

  According to a fourth invention, in the first or third invention, the urging portion has a plate shape extending from the main body portion of the driving member, and the urging portion is interposed between the urging portion and the main body portion of the driving member. A gap is formed to allow bending deformation of the part, and the casing is provided with a support part that supports the biasing part from the side opposite to the gap when the damper is in a predetermined region on the closing side. It is characterized by.

  According to this configuration, when the damper is in the predetermined region on the closing side, the urging portion is supported by the support portion of the casing. In this state, the urging portion can be bent and deformed with respect to the main body portion of the drive member, thereby obtaining an effective urging force.

  According to a fifth invention, in the fourth invention, the urging portion has a bent portion, and the urging force is obtained by deformation of the bent portion.

  According to this configuration, the biasing force can be easily adjusted by changing the shape of the bent portion of the biasing portion.

  A sixth invention is characterized in that in any one of the first to fifth inventions, a plurality of urging portions are provided.

  According to this configuration, it is possible to disperse the reaction force when the urging force is applied to a plurality of locations of the damper drive structure.

  According to the first invention, the urging portion that urges the damper in the predetermined region on the closing side toward the open position is integrally formed with the drive member of the damper, so that the assembly workability is improved and the production is improved. Can be improved. Moreover, since the rattling of the urging unit can be avoided, the generation of abnormal noise can be suppressed.

  According to the second invention, as in the first invention, productivity can be improved and generation of abnormal noise can be suppressed.

  According to the third aspect of the invention, the drive member is made of a resin material, and the urging portion is configured to obtain an urging force by the elasticity of the resin material, so that a desired urging force can be obtained with a simple structure. .

  According to the fourth invention, an effective urging force can be obtained while reducing the cost by making the urging portion into a plate shape that is easy to mold.

  According to the fifth invention, since the urging force is obtained by the deformation of the bent portion, the urging force can be easily adjusted.

  According to the sixth aspect, since a plurality of urging portions are provided, the reaction force when the urging force is applied can be dispersed, and the durability can be improved.

It is the figure which looked at the vehicle air conditioner which concerns on Embodiment 1 from the vehicle rear side. It is a figure which shows the internal structure of an air conditioner. FIG. 4 is a diagram illustrating a damper driving structure when the damper is in an open position according to the first embodiment. FIG. 4 is a view corresponding to FIG. 3 when the damper is in a closed position. FIG. 3 is a diagram corresponding to FIG. 3 according to a second embodiment. FIG. 6 is a view corresponding to FIG. 4 according to the second embodiment. FIG. 9 is a view corresponding to FIG. 3 according to a modification of the second embodiment. FIG. 6 is a diagram corresponding to FIG. 4 according to a modification of the second embodiment. FIG. 6 is a view corresponding to FIG. 3 according to the third embodiment. FIG. 6 is a view corresponding to FIG. 4 according to the third embodiment. It is the XI-XI sectional view taken on the line in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

Embodiment 1
FIG. 1 shows a view of a vehicle air conditioner 1 according to Embodiment 1 of the present invention as viewed from the vehicle rear side. The vehicle in which the air conditioner 1 is disposed is a so-called right-hand drive vehicle in which a driver seat and a passenger seat are provided on the right side and the left side of the vehicle, respectively. In the description of this embodiment, for convenience of explanation, the left side in the vehicle width direction is simply referred to as “left”, and the right side in the vehicle width direction is simply referred to as “right”.

  The air conditioner 1 includes a blower unit 3 that blows air for air conditioning, an air conditioner unit 4 that introduces air blown from the blower unit 3 into conditioned air, and a blower unit 3 that blows air to the air conditioner unit 4. And an intermediate duct 5 for sending air for air conditioning.

  The air conditioning unit 4 is disposed at a substantially central portion in the left-right direction in the instrument panel (not shown), while the air blowing unit 3 is spaced to the left side of the air conditioning unit 4 and in front of the passenger seat. Has been placed.

  The blower unit 3 includes a casing 6. The upper half of the casing 6 is used as an air intake 7 for taking in air for air conditioning into the blower unit 3, while the remaining part is used for blowing air into the air conditioning unit 4. Part 8. An air flow path S extending from the air intake portion 7 to the blower portion 8 is provided in the casing 6, and air-conditioning air introduced from the air intake portion 7 flows through the air flow path S. .

  An air intake 10 for taking in air outside the vehicle compartment is formed on the front side of the vehicle above the air intake portion 7, and an air intake 11 for taking in air inside the vehicle compartment is formed on the rear side of the vehicle. Yes. Both intakes 10 and 11 are connected to the upstream end of the air flow path S and are selectively opened and closed by an inside / outside air switching damper 9. The inside / outside air switching damper 9 is disposed in the air flow path S, and has a rotating shaft 12 extending in the vehicle width direction and a plate-like blocking portion extending from the rotating shaft 12 in one radial direction. 13. The rotation shaft 12 is rotatably supported on the left and right side walls of the casing 6. The right end portion of the rotation shaft 12 passes through the right side wall portion of the casing 6.

  A seal portion (not shown) with which the closing portion 13 abuts is formed at the peripheral portion of the outside air inlet 10 in the casing 6. Further, a seal portion (not shown) with which the closing portion 13 abuts is also formed at the peripheral edge portion of the inside air introduction port 11 in the casing 6.

  On the right side wall portion of the casing 6, an inside / outside air switching motor actuator 15 and an inside / outside air switching link mechanism 16 for rotating the inside / outside air switching damper 9 are disposed.

  The inside / outside air switching motor actuator 15 is fastened and fixed to a boss (not shown) protruding from the right side wall portion of the casing 6. The inside / outside air switching link mechanism 16 includes a driving link 17 to which the output shaft of the inside / outside air switching motor actuator 15 is connected, and a driving arm 18 to which the rotation shaft 12 of the inside / outside air switching damper 9 is connected. These are engaged with each other. The drive link 17 and the drive arm 18 are formed by molding a resin material such as polypropylene.

  When the operating force by the inside / outside air switching motor actuator 15 is transmitted to the inside / outside air switching damper 9 via the drive link 17 and the driving arm 18, the inside / outside air switching damper 9 rotates around the rotation shaft 12, and One of the outside air inlet 10 and the inside air inlet 11 is closed by the inside / outside air switching damper 9 and the other is opened. In other words, when the outside air intake 10 is fully opened by the inside / outside air switching damper 9, the inside air intake 11 is fully closed, and the outside air intake mode for taking in only the air outside the passenger compartment is set. On the other hand, when the outside air inlet 10 is fully closed, the inside air inlet 11 is fully opened, and the inside air circulation mode for taking in only the air in the passenger compartment is set. Note that a grid-like grill 14 is provided at the inside air inlet 11.

  On the other hand, a filter disposing portion 21 in which a filter 20 for filtering air taken in from the outside air intake port 10 or the inside air intake port 11 is disposed at the lower portion of the air intake portion 7. A centrifugal multiblade fan (air conditioning device) 23 is disposed below the filter disposing portion 21 with its rotation axis directed in the vertical direction. Further, below the fan 23, the fan is disposed. A fan drive motor 24 for driving the motor 23 is provided. In addition, the arrow in FIG. 1 has shown the flow of air.

  The left end portion of the intermediate duct 5 is fixed to the right side wall portion of the casing 6 in the air blowing portion 8, and the left end portion of the intermediate duct 5 passes through an opening (not shown) formed in the right side wall portion of the casing 6. The air flow path S in the casing 6 is in communication. The intermediate duct 5 is formed to extend obliquely downward from the left end portion toward the lower end portion of the air conditioning unit 4. The right end of the intermediate duct 5 is opened at the lower end of the casing 30 of the air conditioning unit 4 and connected to an inlet 25 (shown in phantom lines in FIG. 2) for introducing air for air conditioning into the casing 30. Yes. A control circuit 26 for controlling the rotational speed of the fan drive motor 24 is disposed on the upper wall of the intermediate duct 5.

  The casing 30 of the air conditioning unit 4 is long in the vertical direction as a whole, and is larger than the casing 6 of the blower unit 3.

  An air flow path R extending upward from the introduction port 25 is provided in the casing 30. As shown in FIG. 2, the upstream side of the air flow path R is configured by a cooling passage 33 that extends from the inlet 25 to a substantially central portion in the vertical direction of the casing 30. The air-conditioning air introduced from the introduction port 25 changes its direction upward in the cooling passage 33 and flows.

  An evaporator (air conditioning device) 34 as a cooling heat exchanger that passes and cools the air-conditioning air flowing through the cooling passage 33 crosses the cooling passage 33 in the middle in the vertical direction of the cooling passage 33. It is arranged. The evaporator 34 constitutes one element of the refrigeration cycle, and cools the air passing therethrough. Reference numeral 35 denotes a drain portion for draining condensed water dripping from the evaporator 34.

  The downstream end of the cooling passage 33 is branched into two in the vehicle longitudinal direction. A front cold air outlet 37 is formed at the downstream end of the cooling passage 33 on the front side of the vehicle, and a rear cold air outlet 38 is formed at the downstream end of the rear side of the vehicle. A central partition 40 is provided between the front side cold air outlet 37 and the rear side cold air outlet 38 to divide the inside of the casing 30 into the cooling passage 33 and the space above it.

  A heating passage 41 constituting an intermediate portion in the air flow direction of the air flow path R is connected to the front cold air outlet 37. The heating passage 41 extends obliquely upward toward the rear side of the vehicle as a whole above the central partition wall 40. In the middle of the heating passage 41, a heater core (air conditioning device) 43 as a heating heat exchanger that heats by passing the cold air flowing through the heating passage 41 is disposed across the heating passage 41. . The cooling water of the engine is constantly circulated in the heater core 43, and the air passing through the heater core 43 is heated by this cooling water.

  Above the heater core 43, there is provided an upper partition wall 45 that divides the upper half of the casing 30 into the heating passage 41 and the space above it. A hot air outlet 46 opens toward the rear of the vehicle between the rear end of the upper partition 45 and the rear end of the central partition 40.

  Near the front cold air outlet 37 and the rear cold air outlet 38 in the air flow path R of the casing 30, a first temperature adjustment damper that opens and closes the air outlets 37 and 38 according to the room temperature set by the passenger. 48 and a second temperature control damper 49 are arranged.

  The first temperature adjusting damper 48 is a butterfly damper including a rotating shaft 58 and two plate-like closing portions 59 extending on both radial sides of the rotating shaft 58. Seal members 61 are disposed on the peripheral edge of the closing portion 59. The seal member 61 is made of an elastic material such as a member obtained by foaming resin. The left and right ends of the rotation shaft 58 of the first temperature adjustment damper 48 are rotatably supported by the left and right side walls of the casing 30. The left end portion of the rotation shaft 58 passes through the left side wall portion of the casing 30.

  The second temperature adjusting damper 49 includes a rotating shaft 50 and a plate-like closing portion 51 extending in one radial direction of the rotating shaft 50. Sealing members 56 are disposed on the opposite sides of the peripheral portion of the closing portion 51. These seal members 56 are the same as the seal member 61 of the first temperature control damper 48. The left and right ends of the rotation shaft 50 of the second temperature adjustment damper 49 are rotatably supported on the left and right side walls of the casing 30. The left end portion of the rotation shaft 50 penetrates the left wall portion of the casing 30.

  Inside the casing 30, a first seal portion 30 a with which the seal member 61 of the first temperature adjustment damper 48 abuts is formed. The first seal portion 30 a extends continuously to the peripheral edge portion of the front side cold air outlet 37. When the first temperature adjustment damper 48 is in a position where the front cold air outlet 37 is fully closed, the seal member 61 comes into contact with the first seal portion 30a. The first temperature adjusting damper 48 is rotated to a position where the seal member 61 is rotated away from the first seal portion 30a and the front cold air outlet 37 is fully opened (shown in FIG. 2).

  Further, the casing 30 is formed with a second seal portion 30b and a third seal portion 30e with which the seal member 56 of the second temperature adjustment damper 49 abuts. The second seal portion 30 b extends continuously to the peripheral edge portion of the rear side cold air outlet 38. When the second temperature control damper 49 is in a position (closed position) in which the rear cold air outlet 38 is fully closed (shown in FIG. 2), the seal member 56 comes into contact with the second seal portion 30b. . The third seal portion 30e extends continuously to the peripheral edge of the hot air outlet 46. When the second temperature adjustment damper 49 is in a position (closed position) where the hot air outlet 46 is fully closed, the seal member 56 comes into contact with the third seal portion 30e.

  The second temperature adjustment damper 49 rotates in a direction in which the seal member 56 moves away from the second seal portion 30b, and reaches a position (open position) in which both the rear cold air outlet 38 and the hot air outlet 46 are fully opened. . In addition, the operating region from the position before the second temperature adjusting damper 49 contacts the second seal portion 30b (shown in phantom lines in FIGS. 2 and 4) to the second seal portion 30b is closed. The predetermined region X.

  As shown in FIG. 1, a temperature adjusting motor actuator 110 and a temperature adjusting link mechanism 111 are disposed on the upper left side wall portion of the casing 30. The temperature adjusting motor actuator 110, the temperature adjusting link mechanism 111, and the casing 30 constitute a damper driving structure 112 that drives the first and second temperature adjusting dampers 48 and 49.

  The temperature adjusting motor actuator 110 is fastened and fixed to a boss (not shown) protruding from the left side wall, and is separated from the left side wall to the left. The temperature adjusting link mechanism 111 is located between the temperature adjusting motor actuator 110 and the left side wall portion of the casing 30.

  As shown in FIG. 3, the temperature adjustment link mechanism 111 is connected to the drive plate 102 to which the output shaft (not shown) of the temperature adjustment motor actuator 110 is connected, and the rotation shaft 50 of the second temperature adjustment damper 49. A fixed drive arm (drive member) 103 and a drive link (drive member) 104 engaged with the drive arm 103 are provided. In FIG. 3, a part of the casing 30 is shown in cross section.

  The drive plate 102, the drive arm 103, and the drive link 104 are formed by molding a resin material having elasticity. Examples of this resin material include polypropylene. The drive plate 102 is positioned on the leftmost side, the drive link 104 is positioned on the right side of the drive plate 102, and the drive arm 103 is positioned on the right side of the drive link 104.

  The drive plate 102 is formed in a substantially semi-disc shape (a part is shown in FIGS. 3 and 4). In the vicinity of the center portion of the drive plate 102, a connection hole 102a is formed, in which an output shaft (not shown) of the temperature adjusting motor actuator 110 is inserted and connected integrally with the drive plate 102. Two slits 102b (only one is shown) are formed in the peripheral part of the drive plate 102 at intervals in the circumferential direction. Each of the slits 102b is bent in the radial direction of the drive plate 102 in the middle of the slit 102b in the longitudinal direction.

  The drive arm 103 is formed in a substantially linear shape. An insertion hole 103a into which the rotation shaft 50 of the second temperature adjustment damper 49 is inserted is formed at one end of the drive arm 103, and the rotation shaft 50 and the drive arm 103 are integrally rotated. On the other end side of the drive arm 103, a slit-like hole 103b extending in the longitudinal direction of the drive arm 103 is formed. Note that the hole 103b does not have to be a slit, and may be, for example, a groove.

  The drive link 104 is substantially L-shaped. A hole 104 a through which a fastening member 107 for attaching the link 104 to the casing 30 is inserted is formed at a corner of the drive link 104. The drive link 104 rotates around the fastening member 107 while being attached to the casing 30 by the fastening member 107.

  One end of the drive link 104 protrudes from one side pin 104b that engages with the hole 103b of the drive arm 103, and the other end is inserted into the slit 102b of the drive plate 102. The other-side pin 104c that is engaged in the state is projected.

  The drive link 104 is provided with a biasing portion 104d that biases the second temperature adjustment damper 49 toward the open position. The urging portion 104 d has a plate shape extending from the corner portion of the drive link 104 toward the other side pin 104 c and is integrally formed with the drive link 104. A gap A is formed between the urging portion 104d and the main body portion of the drive link 104 to allow the urging portion 104d to bend and deform.

  The width and thickness of the urging portion 104d are set to be substantially the same from the proximal end to the distal end of the urging portion 104d. A bent portion 104e is provided in the middle portion in the longitudinal direction of the urging portion 104d. The proximal end side of the bending portion 104e of the urging portion 104d extends away from the main body portion of the drive link 104 as the bending portion 104e is approached. The tip side of the bent portion 104e extends so as to approach the main body portion of the drive link 104 as it goes to the tip. The tip of the urging portion 104 d is separated from the main body portion of the drive link 104.

  The urging portion 104d is bent and deformed in a direction in which the distal end side approaches the main body portion of the drive link 104 with the vicinity of the proximal end portion as a center. Moreover, it deform | transforms so that the bending part 104e may open.

  Further, a support portion 30 c for supporting the biasing portion 104 d from the side opposite to the gap A is provided on the left side wall portion of the casing 30. The support portion 30 c has a plate shape that protrudes outward from the casing 30 from the left side wall portion, and is integrally formed with the casing 30. When the urging portion 104d is supported by the support portion 30c from the side opposite to the gap A, the urging force is applied to the drive link 104. The position of the support portion 30c supports the urging portion 104d when the second temperature adjustment damper 49 is in the above-described predetermined region X on the closing side, and the second temperature adjustment damper 49 is other than the predetermined region X on the closing side. In this area, as shown in FIG. 3, it is arranged so as to be away from the urging portion 104d. The urging force by the urging unit 104d is set to be smaller than the driving force of the temperature adjusting motor actuator 110.

  Similarly to the second temperature adjustment damper 49, the first temperature adjustment damper 48 is driven by a temperature adjustment motor actuator 110 via a drive plate 102, a drive link (not shown), and a drive arm (not shown). It has come to be.

  In addition, an air mix space 65 constituting the downstream side of the air flow path R is provided above the rear cold air outlet 38 on the vehicle rear side in the casing 30. The rear side cold air outlet 38 and the hot air outlet 46 are connected to the air mix space 65, and cold air and hot air respectively flow from the rear side cold air outlet 38 and the hot air outlet 46. . The cold air and the warm air flowing into the air mix space 65 are mixed in the air mix space 65 to become conditioned air.

  As shown in FIG. 1, a face outlet 66 connected to the air mix space 65 is formed in the upper wall portion of the casing 30 at a position substantially directly above the air mix space 65.

  The face air outlet 66 allows the conditioned air generated in the air mix space 65 to be led out to a center ventilator and a side ventilator (not shown) respectively provided at the substantially central portion in the left-right direction and both left and right end portions of the instrument panel. For this purpose, it is divided into a center outlet 66a and a side outlet 66b.

  Above the upper partition wall 45 in the casing 30, a defroster lead-out chamber 68 that forms the downstream side of the air flow path R is provided. A first opening 69 for allowing the conditioned air generated in the air mix space 65 to flow into the defroster outlet chamber 68 is provided between the rear end of the upper partition 45 and the upper wall of the casing 30. Yes. In the upper wall portion of the casing 30 at a position near the vehicle front side above the defroster outlet chamber 68, the conditioned air flowing into the defroster outlet chamber 68 is led to a defroster and a demister (not shown) provided in the instrument panel. A defroster outlet 70 is formed.

  A foot derivation chamber 71 that forms the downstream side of the air flow path R is formed on the vehicle front side of the defroster derivation chamber 68 in the casing 30, and a wall portion between the foot derivation chamber 71 and the defroster derivation chamber 68 is formed on the wall. A second opening 72 for allowing the conditioned air in the defroster outlet chamber 68 to flow into the foot outlet chamber 71 is formed. In addition, left and right foot outlets 73 are formed in the upper part of the left and right side walls of the casing 30 to guide the conditioned air in the foot derivation chamber 71 to the feet of the passengers in the driver seat and the passenger seat, respectively. Yes. That is, these left and right foot outlets 73 are connected to left and right foot ducts (not shown) extending rearward and downward along the left and right side walls of the casing 30, respectively. Are open at the foot of each passenger in the driver's seat and passenger seat. From the openings of these foot ducts 74, the conditioned air in the foot derivation chamber 73 blows out toward the feet of each occupant.

  In the vicinity of the downstream end of the air flow path R, a first blowing direction switching damper 76 that opens and closes the center blowing portion 66a and the side blowing portion 66b simultaneously according to the blowing mode set by the occupant is provided. The first blowing direction switching damper 76 includes a rotation shaft 86 extending in the left-right direction, a plate-shaped blocking portion 87 extending in one radial direction from the rotation shaft 86, and both surfaces of the blocking portion 87. And a sealing member 88 provided respectively. The left and right end portions of the rotation shaft 86 are supported on the left and right side walls of the casing 30. The left end portion of the rotation shaft 86 passes through the left side wall portion of the casing 30.

  The first blowing direction switching damper 76 rotates around the rotation shaft 86 between a position where the center blowing portion 66a and the side blowing portion 66b are fully opened and a position where the center blowing portion 66b is fully closed. When the first blowing direction switching damper 76 fully opens the center blowing portion 66a and the side blowing portion 66b, the first opening 69 is fully closed, while the first blowing direction switching damper 76 is When the center outlet 66a and the side outlet 66b are fully closed, the first opening 69 is fully opened.

  Near the downstream end of the air flow path R, a second blowing direction switching damper 77 that opens and closes the defroster outlet 70 according to the blowing mode is provided. Similar to the first blowing direction switching damper 76, the second blowing direction switching damper 77 includes a rotation shaft 92, a closing portion 93, and a seal member 94 extending in the left-right direction. The left and right ends of the rotation shaft 92 are supported by the left and right side walls of the casing 30. The left end portion of the rotation shaft 92 passes through the left side wall portion of the casing 30.

  The second blowing direction switching damper 77 rotates around the rotation shaft 92 between a position where the defroster outlet 70 is fully opened and a position where the defroster outlet 70 is fully closed. When the second blowing direction switching damper 77 fully closes the defroster outlet 70, the second opening 72 is fully opened, while when the second blowing direction switching damper 77 fully opens the defroster outlet 70, The second opening 72 is fully closed.

  By rotation of the first blowing direction switching damper 76 and the second blowing direction switching damper 77, the center blowing portion 66a, the side blowing portion 66b, the defroster outlet 70, and the second opening 72 are opened and closed, respectively. Arbitrary blowing mode such as face mode, defroster mode, foot mode, etc.

  Next, the assembly process of the damper drive structure 112 for driving the first and second temperature control dampers 48 and 49 will be described. Since the urging portion 104d is integrally formed with the drive link 104 as described above, the drive link The urging portion 104 d can be assembled to the casing 30 at the same time that the 104 is assembled to the casing 30. At this time, since the assembly position of the urging portion 104d is determined by the assembly of the drive link 104, adjustment of the assembly position of the urging portion 104d becomes unnecessary. Further, after the drive link 104 is assembled, since the urging portion 104d is integrated with the drive link 104, the urging portion 104d does not rattle due to vibrations during traveling of the vehicle.

  Next, the operation of the air conditioner 1 will be described. When the fan 23 rotates, air is introduced into the air flow path S in the casing 6 from the intake opening that is fully opened by the internal / external air switching damper 9 among the external air intake 10 and the internal air intake 11. The air introduced into the air flow path S is introduced into the air flow path R of the casing 30 of the air conditioning unit 4 through the intermediate duct 5 and passes through the evaporator 34. At this time, the amount of air passing through the heater core 43 is set according to the opening degree of the first temperature adjustment damper 48 and the second temperature adjustment damper 49, and the temperature of the conditioned air is changed.

  For example, when obtaining the maximum heating capacity, the first temperature control damper 48 is set to the open position and the second temperature control damper 49 is set to the close position.

  When the dampers 48 and 49 are moved, the temperature adjusting motor actuator 110 is operated. When the temperature adjusting motor actuator 110 is operated, an operating force is applied to the drive plate 102, and the drive plate 102 rotates. By the rotation of the drive plate 102, the slit 102b is displaced in the rotation direction. Due to the displacement of the slit 102b, the other pin 104c of the drive link 104 is engaged and displaced with the peripheral edge of the slit 102b, and the drive link 104 rotates while drawing a locus corresponding to the shape of the slit 102b. As the drive link 104 rotates, the one side pin 104b engages with the peripheral edge of the hole 103b and the drive arm 103 moves, whereby the second temperature adjustment damper 49 rotates.

  Only when the second temperature control damper 49 is in the region X on the closing side, the urging portion 104d abuts on the support portion 30c of the casing 30 and is supported by the support portion 30c. When the second temperature adjustment damper 49 is rotated in the closing direction, the urging portion 104d is bent and deformed, so that the drive link 104 moves the second temperature adjustment damper 49 toward the open position. The biasing force for biasing is applied smaller than the driving force. Further, the bent portion 104e of the urging portion 104d is elastically deformed so as to open widely, and this also provides the urging force. The urging force can be easily changed by changing the angle and shape of the bent portion 104e.

  By applying the urging force, the second temperature adjustment damper 49 does not strike the second seal portion 30b vigorously, and the generation of abnormal noise is suppressed.

  When the second temperature adjustment damper 49 is in the closed position, the wind pressure due to the air flowing through the heater core 43 acts on the second temperature adjustment damper 49. Since the second temperature adjustment damper 49 is pushed in the closing direction by this wind pressure, a large operating force is required when trying to open it. At this time, the second temperature adjustment damper 49 is urged toward the open position by the urging portion 104d and the driving force is assisted, so that the operability is improved.

  The temperature of the conditioned air is adjusted by the opening degree of the first and second temperature adjusting dampers 48 and 49. And the conditioned air is supplied to each part of the passenger compartment according to the blowing mode.

  As described above, according to the first embodiment, when the second temperature adjustment damper 49 is in the predetermined region X on the closing side, the biasing portion 104d that biases the damper 49 toward the open position is provided. Since it is integrally formed with the drive link 104, assembly workability is improved and productivity can be improved. Further, it is possible to avoid the rattling of the urging unit 104d and suppress the generation of abnormal noise.

  Further, since the drive link 104 is made of a resin material and an urging force is obtained by the elasticity of the resin material, a desired urging force can be obtained with a simple structure.

  Further, an effective urging force can be obtained while reducing the cost by making the urging portion 104d into a plate shape that can be easily formed.

  In addition, since the urging force can be obtained by the deformation of the bent portion 104e, the urging force can be easily adjusted.

  The width of the urging portion 104d may be narrowed toward the tip side. Further, the thickness of the urging portion 104d may be made thinner toward the tip side. Further, the urging portion 104d may be configured to extend straight without forming the bent portion 104e in the urging portion 104d.

<< Embodiment 2 >>
5 and 6 show a damper drive structure according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment in that the urging portion is provided not on the drive link 104 but on the drive arm 103, and the other parts are the same as those in the first embodiment. A different part from Embodiment 1 is demonstrated in detail.

  The urging portion 103d extends from the vicinity of the insertion hole 103a of the drive arm 103 toward the opposite side of the drive arm 103, and has a plate shape similar to that of the urging portion 104d of the first embodiment. A bent portion 103e is provided in the middle portion in the longitudinal direction of the urging portion 103d. The base end side of the bending portion 103e of the urging portion 103d extends away from the main body portion of the drive arm 103 as it approaches the bending portion 103e. The tip side of the bent portion 103e extends so as to approach the main body portion of the drive arm 103 as it goes to the tip. The tip of the urging portion 103 d is separated from the main body portion of the drive arm 103. A gap B is formed between the urging portion 103 d and the main body portion of the drive arm 103.

  Further, a support portion 30 d for supporting the urging portion 103 d from the side opposite to the gap B is provided on the left side wall portion of the casing 30. The support portion 30 d has a plate shape protruding from the left side wall portion to the outside of the casing 30, and is integrally formed with the casing 30. The position of the support portion 30d supports the urging portion 103d when the second temperature adjustment damper 49 is in the above-described predetermined region X on the closing side, and the second temperature adjustment damper 49 is other than the predetermined region X on the closing side. When it is in this area, it is arranged so as to be away from the urging portion 103d as shown in FIG.

  As a result, when the second temperature adjustment damper 49 is in the predetermined region X on the closing side, the driving arm 103 is given a biasing force that biases the damper 49 toward the open position to be smaller than the driving force. It will be.

  Further, at the time of assembly, since the urging portion 103 d is integrally formed with the drive arm 103, the urging portion 103 d can be assembled to the casing 30 simultaneously with the drive arm 103. At this time, since the assembly position of the urging portion 103d is determined by the assembly of the drive arm 103, it is not necessary to adjust the assembly position of the urging portion 103d. Further, after the drive link 103 is assembled, the urging portion 103d is integral with the drive link 103, so that the urging portion 103d does not rattle.

  As described above, according to the second embodiment, as in the first embodiment, since the urging portion 103d is integrally formed with the drive arm 103, the assembling workability is improved and the productivity can be improved. Further, it is possible to avoid the rattling of the urging unit 103d and suppress the generation of abnormal noise.

  7 and 8, the drive link 104 may be provided with a biasing portion 104d similar to that of the first embodiment. In this modification, the support 30c similar to that of the first embodiment is also formed in the casing 30. Therefore, since the urging force acts on both the drive arm 103 and the drive link 104, the reaction force when the urging force is applied can be dispersed as compared with the case where the urging force acts only on one side, and the durability. Can be improved.

  In the first and second embodiments, the urging portions 104d and 103d are formed in a plate shape. However, the present invention is not limited thereto, and may be formed in a rod shape, for example.

<< Embodiment 3 >>
9 to 11 show a damper drive structure according to Embodiment 3 of the present invention. The third embodiment is different from the first and second embodiments in that the urging portion 30f is provided on the casing 30, and the other parts are the same as those of the first embodiment. Will be described in detail.

  As shown in FIG. 11, the urging portion 30f includes an elastic plate portion 30g that protrudes outward from the left side wall portion of the casing 30, and a contact piece portion 30h that is integrally formed with the distal end portion in the protruding direction of the elastic plate portion 30g. And. The elastic plate portion 30g is formed so as to be elastically deformed by the elasticity of the resin material (for example, polypropylene) constituting the casing 30.

  As shown in FIGS. 9 and 10, the contact piece 30 h protrudes from the front end in the protruding direction of the elastic plate 30 g toward the side surface on the drive link 104 side, and comes into contact with the side surface of the drive link 104. Is positioned.

  The position of the contact piece 30h is such that the drive link 104 is supported when the second temperature adjustment damper 49 is in the predetermined region X on the closing side, and the second temperature adjustment damper 49 is on the predetermined region X on the closing side. When it is in a region other than, it is arranged so as to be away from the drive link 104 as shown in FIG. In FIG. 11, the urging portion 30f in a state where no urging force is applied is indicated by a virtual line, and the urging portion 30f in a state where the urging force is applied is indicated by a solid line.

  Thus, when the second temperature adjustment damper 49 is in the predetermined region X on the closing side, the urging force that urges the damper 49 toward the open position is applied to the drive link 104 to be smaller than the driving force. It will be.

  Further, in this embodiment, since the urging portion 30f is integrally formed with the casing 30, the work of assembling the urging portion 30f to the casing 30 is unnecessary. Therefore, adjustment of the assembly position of the urging portion 30f is not necessary. Further, since the urging portion 30f is integral with the casing 30, the urging portion 30f does not rattle.

  As described above, according to the third embodiment, as in the first embodiment, the assembly workability is improved and the productivity can be improved. Further, it is possible to prevent the generation of abnormal noise by avoiding rattling of the urging unit 30f.

  Further, the urging portion 30 f may be disposed so as to contact the drive arm 103, and an urging force may be applied to the drive arm 103.

  Further, the biasing portion 30f of the third embodiment may be provided in the first and second embodiments.

  In the first to third embodiments, the case where the first temperature adjustment damper 48 and the second temperature adjustment damper 49 are automatically opened and closed by the temperature adjustment motor actuator 110 has been described. The temperature adjusting motor actuator 110 may be omitted, and the first temperature adjusting damper 48 and the second temperature adjusting damper 49 may be manually opened and closed with an operating force (not shown) operated by an occupant. One end portion of the operation wire is connected to, for example, an operation dial or an operation lever of the instrument panel, and the other end portion is connected to the drive plate 102, and an operation force by an occupant is applied to the drive plate 102.

  Further, the urging unit according to the present invention includes not only the drive arm and drive link of the temperature adjustment damper, but also the drive arm and drive for driving the first blowing direction switching damper 76 and the second blowing direction switching damper 77, for example. It can also be provided on the link, and can also be provided on the drive link 17 and the drive arm 18 for driving the inside / outside air switching damper 9.

  Moreover, although this embodiment demonstrated the case where this invention was applied to what is called a semicenter type air conditioner 1 with which the ventilation unit 3 and the air conditioning unit 4 were provided along with the left-right direction, this invention The present invention can also be applied to a so-called full center type air conditioner in which a unit and an air conditioning unit are integrated.

  As described above, the present invention is suitable, for example, when driving a temperature adjustment damper or a blowing direction switching damper of a vehicle air conditioner.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 30 Casing 30b Seal part 34 Evaporator (equipment for air conditioning)
43 Heater core (air conditioning equipment)
49 2nd temperature control damper 103 Drive arm (drive member)
103d Energizing part 104 Drive link (drive member)
104d Energizing part 30f Energizing part R Air flow path

Claims (6)

A casing that is formed to accommodate air conditioning equipment and has an air flow path;
A damper provided in the air flow path of the casing, for opening and closing the air flow path;
A driving member connected to the damper and transmitting a driving force to the damper;
In the damper drive structure for a vehicle air conditioner configured to operate between a closed position where the damper contacts a seal portion formed inside the casing and an open position away from the seal portion,
The drive member is urged to bias the damper toward the open position when it is in a predetermined region on the closed side from the predetermined position before the damper contacts the seal portion to the contact with the seal portion. A damper drive structure for a vehicle air conditioner, wherein an urging portion for applying a force smaller than the drive force is integrally formed. A casing that is formed to accommodate air conditioning equipment and has an air flow path;
A damper provided in the air flow path of the casing, for opening and closing the air flow path;
A driving member connected to the damper and transmitting a driving force to the damper;
In the damper drive structure of a vehicle air conditioner configured to operate between a closed position where the damper is in contact with a seal portion formed inside the casing and an open position away from the seal portion,
The casing has a biasing force that biases the damper toward the open position when the damper is in a predetermined region on the closed side from the predetermined position before the damper contacts the seal portion to the contact with the seal portion. A damper drive structure for an air conditioner for a vehicle, wherein an urging portion that is applied smaller than the driving force is integrally formed. In the damper drive structure of the vehicle air conditioner according to claim 1,
A damper drive structure for a vehicle air conditioner, wherein the drive member is made of a resin material having elasticity, and the biasing portion is configured to apply a biasing force by the elasticity of the resin material. In the damper drive structure of the vehicle air conditioner according to claim 1 or 3,
The urging portion has a plate shape extending from the main body portion of the driving member, and a gap is formed between the urging portion and the main body portion of the driving member to allow bending deformation of the urging portion,
A damper drive structure for a vehicle air conditioner, wherein the casing is provided with a support portion that supports the biasing portion from a side opposite to the gap when the damper is in a predetermined region on the closing side. In the damper drive structure of the vehicle air conditioner according to claim 4,
The damper drive structure for a vehicle air conditioner, wherein the urging portion has a bent portion, and is configured to obtain an urging force by deformation of the bent portion. In the damper drive structure of the vehicle air conditioner according to any one of claims 1 to 5,
A damper drive structure for a vehicle air conditioner, comprising a plurality of urging portions.

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